Improved scbew-box



' A.LfIr-rtrti.'i'tg-teev etmt 'fitted lAmazon JAMESON-.fOFLTRENTON, NEW JERSEY, ASSIGNOR. 'To HI'MSELF', T.- s MURRsr AND, J. E, MURRAY, or THE.. SAME rLAoE. Leners Param: No. 65,676,0zazed June 11, 135,7'.

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Be it'knoym that l, ABIEZ'ER JAMESON, of Trentop,'Mercer county, New Jersey,phave invented an improve` i Tov ALL -WHoM rr- MAY'ooNoEnN mentlin the Manufacture of serein-'Boxes for Vises; and I dohereby declare the following to be ufull, ,cl-ear,V and exact description of the same, reference'being had tmthe accompanying drawing, and to the 'letters of reference marked thereon. i.

My invention consists of emotie-substantially a-s described hereafter, of manufacturing screw-boxes for visemwhereby a superior boxl is produced in less time, and'irith less labor, and expense, than is required in makingthe boxes by `the ordinary process.

" vInY order t'oenable others skillediulthe art to practise my invention, I will nowvproceed todes'cribe the manner of carrying it into effecthreference being had to the accompanying drawing, which forms a partof this specication, and'i'n which l 4 1 Y Figure 1- is;a'longitudina,l section of ascrewslbox for `vises constructed according to my improvement.

Figure 2, an exterior. view. 4 v Figures 3 toinclusive are diagrams illustrating the manner in which .the screw-box is made and Figures? to 12 inclusive, diagrams illustrating the usual manner of making screw-boxes. Y .In order that'the nature of myimprovement-may be betterV understood, I will rst describe the. manner in which' screw-boxes for vises have Iheretofore been made. i K

l A atshest of iron, A, jlig. 7, of .the proper thickness and size, is hea-tedLand bent to the 'form of a split tube, B, fig. 8,'the edges ofl which, after4 thev .tube is again heated, are welded together.. ,A vshort'fhar of iron isziow bent so as to form arsplit'rin'g, C, iig. 9, which is passed, for .about halt` its Vwidth, on to the lower end of 'the tube B, -andis then welded to the .tube so as to form a. continuous iid-nge, a, as shown in g. 11. A second plate isnow bentfand lweldedso as toform a tube, D, which is smaller' in diameter than the tube B, and which, after its end is passed into the flange a, figli, is 'heated and' welded to theflunge and tube B. A narrow strip, a, forming a feather, is tlren'weldedt'o 'the exterior surface of the -tubo D. 'A thread is now cut in the interiorof the tube, after 'whicha block., E, is introduced into and 'welded in the end of the tuheB. 'lhe box thus roughlyforlned is4 then turned in a lathe to the proper external shape und dimensions.

As these'operations are performed by, hand, the manufacture of the boxes 1s tedious andcxpensiue; the different bo-Xcs iare: irregular in forni and dimensions; thewelds are often defective, especially/:1t the `point where the two tubes B. D are connected, while, during the repeated beatings to which the box is subjected, the metal isso frequently b'urnt'that the box will crack, or the screw-threads in thetube. D will breuk :muy on the 'application of but a. slight pressure. i i

In order toovercome these difficulties, I-construct thevboxes in the following manner :i 4

A sheet ofmetal, A, iig. 3, `equal in length tothe length of the box to lic-unido. is first heated, :ind bent` so as to 'form aisplit tube',B'aftcr which' a bar iSv-bent into a ring, C, and is` placed on the tube about midway between` the ends ofthe same. The tubeand its'ringslaro broughtto :t "eldinr heut, and u former, X,`reduccdin diameter atone end', is introduced into the tube, the vshoulder .r of the former being about midway between' the edges of thering B, .its shown in iig. 6. The tubo non' compressed between dies of such a shape that,

whilel the edges of the tubo nreweldcd together` und the ring u'ol'derl to the tube, the lower .portion of the tube will also be compressed on to the smaller end of the former- X', und will thus be reduced in diameter, :is shown in iig. 6. The-former X is now withdrawn, and a strip, a, to forni the 'feathcr,77 is welded to the smaller por tion of theftube. The thread is'cut in the usual manner. `ilfhlock, e, is welded in the larger end of the tube, and the latter is turned to the proper external 'size and shape. As the boxw is 'formed from aeontinuous sheet -of metal the necessity of-repeatedl beatings and weldings required to secure' together the .diferenl parts-in making thel boxes by the usual process is avoided. The-metal is not burned, und the boxes are stronger, while, by the luse ofdies, the expense and labor are greatly reduced, and the boxes produced ure of uniform size and shape.

,I claim as my invention, and 'di-sire to secure by Letters Patent- The method, substantially as above described, 'of making screw-boxes for vises.

Intestimonywhereof have signed my name to this specification in the presence of two subscribing witnesses ABIEZER JAMESON.

Witnesses:

Cinemas E. Fos'run, JOHN, WHITE. 

